Preheat an oven 175°C/350°F.Line a baking tray.Place hazelnuts on tray.Roast 10-15 mins - watch closely.Let cool for about 20 mins.Place hazelnuts in a clean tea/dish towel.Rub vigorously to remove as many skins as possible.Don't fret if there are still some skins.Process hazelnuts until their natural oils are released,you'll notice when as it will start to clump slightly.Add cocoa, sugar/sweetener, cinnamon, vanilla, oil.Process until it's your desired consistency.Place in a jar.Keep refrigerated.